what.is slider suspend app logic?
On 2015-04-20 17:41 , Steve Loughran Wrote: > On 19 Apr 2015, at 03:57, [email protected] wrote: > > does slider support suspend application? > sigstop? > > container release without warning. > > > > On 2015-04-18 21:33 , Steve Loughran Wrote: > > hi > > you can stop and application and start it again; when you stop the > application it kills the HBase processes and the slider AM, returning all > resources to YARN. > > If you really need to stop HBase for a while, that's the way to do it. > > you can also shrink a running application via the slider fiex command: you > can, say, shrink the number of HBase region servers. Each of these is going > to take on more work -so more CPU and network traffic; nothing comes for > free. But if your HBase instance isn't too busy, that works. > > Finally, you can use YARN pre-emption and tell slider to use a pre-emptible > queue for containers (you can do this in its resources.json file), or just > launch the application against the specific queue and have it default to > everywhere. I'd recommend having the AM non-preemptible, and the other > components pre-emptible. > > When that's set up, when higher priority work comes in, the HBase containers > would be killed. Slider will react by incrementing some failure counters and > asking for it back; it will run a smaller cluster until the containers are > allocated. If you try that, because Slider doesn't know that a container was > pre-empted (only that it exited), you'll need to edit some of the failure > threshold options in resources.json, stopping slider over-reacting to these > failures and killing the application > > -steve > > >> On 18 Apr 2015, at 12:35, skaterQiang <[email protected]> wrote: >> >> Hello guys: >> In the http://slider.incubator.apache.org/index.html it said slider >> can >> " >> >> Stop / Suspend / Resume application instances as needed >> >> " >> and I really need this feature for suspend some job in my yarn cluster and >> let some urgent jobs to have more resource. >> But then I download the slider, it can only stop start "hbase, memcached, >> storm and accumulo", and from the code, it use start and stop command for >> hbase. >> I think it is provisioning and cluster management not application management. >> >> >> Could slider suspend and resume yarn applications, or slider can suspend and >> resume hbase or storm? >> >> >> Thanks in advance, >> Skater >
